Akiko Yonemura defeated Kumiko Iijima 6-0 6-3 in the Saitama 10K qualifying round on hard. The upset overturned the form book — Kumiko Iijima came in leading the head-to-head 3–1. Akiko Yonemura narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-03-26 | Nishi Tama 10K | F | hard | Akiko Yonemura | 1-1 |
| 2011-05-02 | Fukuoka 50K | R16 | grass | Kumiko Iijima | 6-3 7-5 |
| 2010-05-17 | Karuizawa 25K | QF | carpet | Kumiko Iijima | 7-5 7-5 |
| 2007-05-28 | Gunma 25K | SF | carpet | Kumiko Iijima | 6-4 6-7(3) 7-6(4) |